Grip-nut.



UNTTED sTATEs PATENT onirica.

LOUIS J. FLINT, OF DETROIT, MICHIGAN, ASSIGNOR T0 GRIP NUT COMPANY, OF A CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GRIP-NUT.

` Specification of Letters Patent.

- Patented nee. 5, 191e.

Application filed December 11, 1913. ASeria11\To. 805,931.

To aZZ whom t may concern Be it known that I, LOUIS J. FLINT, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Grip- Nuts, of which the following is a description.

My invention belongs to that general class of bolt nuts adapted to fit upon the cooperating bolt in such manner as to reduce the tendency of an accidental disengagement of the two.

To this end my invention consists in the novel method of forming a grip nut, and the product thereof, shown and described and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts, Figure l is a sectional view, showing my improved grip nut upon the bolt; Fig. 2 shows two sections, constituting the grip nut, separated to illustrate the construction, and Fig. 3 is a fragmentary view, showing one of the results of combining the sections in the manner set forth.

In the drawings, it will be seen that the nut is composed of two independent sections, each of which is substantially a complete nut in itself, the two being suitably connected in any preferred manner, as by spot welding, or otherwise, to constitute a single substantially integral nut.

In constructing the nut, any preferred means may be employed to cause a varying fit of the two sections upon the bolt, that is, one section may be standard cut or normal, while the other may vary therefrom and be slightly abnormal, causing it to bind upon the bolt to grip the same, preventing the accidental disengagement by reason of use. As shown, we may assume that the section marked l in Figs. 1 and 2 is a standard cut nut, which will engage the bolt with a finger fit, while 2 is a substantially similar nut, or section, attached to the first in such' a manner that the sides and bolt opening will coincide, and in which the lead of the thread from one section terminates in such proximity to the beginning of the lead in the other that, in placing the nut upon the bolt. the part 9. will readily engage the thread of the bolt, and bind or grip thereonthe sections being so cut as to bring about this result when properly assembled. To accomplish this there may be a slight oifset in the lead so that the thread of the second section of the nut will impinge, or otherwise bind upon the bolt thread, or the thread of the second nut may be cut at a different pitch or inclination, or at a slightly diHerent spiral inclination, or at a slighter depth to bring about such result. In other words, the binding section of the nut may be cut or arranged in any manner in relation to the cooperating section as to bring about or secure the binding effect, while the first section of the nut may be normal or standard cut to secure easy engagement and holding power. yIt is obvious that this result may be secured by having both nuts standard cut, but with the lead of the thread in one slightly advanced over the other in the coperative relation. In such case both the nuts may tend to bind when both the sections take hold of the bolt.

The advantages of my invention will obviously be embodied in any bolt nut comprising two sections secured together, and in which the threads in one section engage the threads of the bolt in a different manner from that in which the threads of the other section engage said threads, causing the nut to bind upon the bolt.

In Fig. 3, the fragmentary section shows the variation between the two sections of the nut in one form, exaggerated for the purposes of illustration, 1 indicating that portion. of the nut which is engaged with the bolt in the normal manner, and 2 the following portion, whose function is to cause the nut to bind upon the bolt.

It is obvious that this nut may be readily engaged with the bolt, and with a suitable wrench firmly seated. and by similar means may be disengaged without iniuring the bolt or nut, so that thetwo may be readily emploved again when desired.

It is also obvious that the thickness of the nut sections may vary as desired without departing from the spirit of my invention` and hence where in the claims I mention nut sections of substantially the same size, the thickness of the sections is not necessarily included.

slightly advanced axially in relation to thatv of the other.

2. A grip nut comprising two sections superimposed one on the other and operably secured. together, the bolt threads in the two sections being substantially the same forni, Size, pitchv and helix', buthaving the thread in one section slightly advanced 15 axially in relation to that ot' the other.

In testimony whereof7A I lhave hereunto signed iny'name in the presence of two subseribing` witnesses.

LOUIS J. FLINT.

Witnesses:

ROY W. HILL CHARLES I. COBB.

Copies of this patent may be obtained for ve cents elachyby addressing the Commissioner of Patents,

Washington, 11C. 

